Improvement in boring-machines



shown, in order to keep them in place.

PATENT OFFICE.

JAMES w. sEAw, or wENo'NA, MICHIGAN.

IMPROVEMENT IN BORING-MACHINES.

Specification forming part of Letters Patent No. 134,009, dated December17, 1872.

To all whom it may concern:

Be it known that I, JAMES W. SHAW, of Wenona, in the county of Bay andState of Michigan, have invented a new and Improved Boring-Machine forrafting purposes, of which the following is a specification:

In the accompanying drawing, Figure 1 is a front elevation, and Fig. 2 aside elevation, of my improved boring-machine.

Similar letters of reference indicate corresponding parts.

This invention relates to a new machine for boring holes in the ends oflogs and pieces of long timber, in order to make them up into. rafts,which is done by strin ging chains through them.

There are immense quantities of logs thus rafted in lumbering districts,and the boring is all done by hand, which is a laborious opy eration, aswell as an expensive one.

A great saving will be effected both in labor and cost by the use ofthis machine. It consists of a frame with which is connected the augerand the machinery for operating the same, the shaft of the auger beingrevolved by machinery secured to the frame.

In the drawing, the letter A represents the frame of the machine; B, theauger; C, the vertical auger-shaft, grooved along its entire length. Theshaft C is revolved by means of abevel-gear wheel, a, through which theshaft passes, afeather or key being made fast in the wheel to fit thegroove in the shaft and cause the same to be turned with the wheel, atthe same time allowing the auger to be raised and lowered while inoperation, which is ac complished by means of a rack, b, and pinion orsegmental, as shown, the rack b being attached to a sliding frame, E, inwhich the upper end of the shaft G is hung. The wheel a is turned bygear-connection e with a shaft,

- D, that hangs in the frame A. This embraces the construction of themachine.

The manner of using it is as follows: The

Vmachine is secured-upon two or more logs, F,

which form a oat and leave a space of about four feet in width betweenthem, directly under the auger. At each end of the float is a curvediron rod which connects the logs Fas e machine is placed in position andthe oating logs to be bored are run under the machine,

' turned one-quarter over, and secured thus by means of dogs, one ofwhich, f, is attached to ik 'the oat, and the other, y, a double 011e:at'

tached to the machine, directly in front of the auger, and driven intothe end of the log to be bored.

The object of these dogs is to keep the object to be bored from movingup and down and to secure it in its place while being bored, which couldnot be accomplished without this device, and also to prevent the logfrom rolling.

The object in turning the log one-quarter is this: When logs are put inthe waterthey assume a position which they retain as long as they remainthere. The lower part of the log, from its contact with the water, in ashort time becomes much the heavier. Consequently, when the boring isdone by hand the hole is bored through the log as it lies in thewatere., perpendicularly. When the raft is made up it is necessary toturn the logs, bringing the hole in a horizontal direction, in order topass the chain through.

One man is thus required to turn and hold the logs while this is beingdone, the chain is then tightened, and a wedge inserted to keep it so,in order to prevent the logs from rolling back to their originalposition until the raft is completed and the chain secured to theoutside logs of the raft.

Now, it is apparent, if the logs were turned when they were bored, whenthey were rcleased they would assume their former position, thusbringing the holes in aline with the water, or in the position requiredin order to 'string them. 1t would much facilitate the labor of rafting,enabling it to be done with less help and in less time. It will alsolessen the strain upon the chains while towing the raft, as the logswill not have a tendency to turn over, as is the case with logs raftedin the old manner.

While the auger is being turned it is slowly fed down by turning thesegments or pinions cl by a crankhandle, I.

Having thus described my invention, I claim as new and desire to secureby- Letters Patentl A boring-machine, arranged on oats F F and providedwith -dogs g g, as described, so as to allow oating logs to be bored inthe manner set forth.

JAMES W. SHAW.

Witnesses N. CLARK, J. F. SHEPARD.

